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lorasvet [3.4K]
4 years ago
13

the separation of ink into its different pigments during chromatography is a a. solubility b. physical property c. physical chan

ge c. chemical change​
Chemistry
1 answer:
madreJ [45]4 years ago
7 0

c. physical change

Explanation:

The separation of ink into its different pigments during chromatography is a physical change.

Ink is a mixture of many different pigments.

During chromatography, a mixture is separated based on the relative migration of constituents of mixture over an adsorbent.

  • Separation techniques are used to celebrate mixtures based on their physical properties.
  • During a physical change only the physical properties of matter like their form and state is changed.
  • The process is easily reversible and no new kinds of matter are formed.

learn more:

Physical property brainly.com/question/10972073

#learnwithBrainly

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Which requires more heat to warm from 22 c to 85 c, 50.0 g of water mor 200. g of aluminum metal?
Yuki888 [10]
Q=mc(change in temp)
Q is amount of heat, m is mass, c is specific heat

Water:
Q= (50.0g)(4.18 J/g°C)(63°C)
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7 0
4 years ago
Consider the reactionI2(g) + Cl2(g)2ICl(g)Using standard thermodynamic data at 298K, calculate the entropy change for the surrou
Georgia [21]

We know,

\Delta H_{I_2(g)}=62.438\ KJ/mol\\\\\Delta H_{Cl_2(g)}= 0.0\ KJ/mol\\\\\Delta H_{ICl(g)}=17.78\ KJ/mol

For given reaction, I_2(g)+Cl_2(g)\ -->\ 2ICl(g)

\Delta H_{rxn}=2\Delta H_{ICl(g)}-\Delta H_{I_2(g)}-\Delta H_{Cl_2(g)}\\\\\Delta H_{rxn}=2(17.78)-0-62.438\ KJ/mol\\\\\Delta H_{rxn}=-26.878\ KJ/mol

For , 2.41 moles of I_2 :

\Delta H_{rxn}=2.41\times (-26.878)\ KJ\\\\\Delta H_{rxn}=-64.78\ KJ

We know :

\Delta S = -\dfrac{\Delta H_{rxn}}{T}\\\\\Delta S = -\dfrac{-64.78}{298}\ KJ/K\\\\\Delta S =-0.21738 \ KJ/K\\\\\Delta S=-217.38\ J/K

Hence, this is the required solution.

7 0
4 years ago
Identify What are the charges on ions of Group 1A,<br> Group 3A (aluminum), and Group 5A?
dalvyx [7]

Explanation:

 Group 1A         +1

 Group 3A         +3 or +1

 Group 5A         +5 or +3

The charges on an ion signifies the number of electrons that has been lost, gained or shared by an atom. These electrons are called valence electrons occupying the outermost shell of an atom.

 Group 1A element will readily be willing to lose an electron giving them a charge of +1

  Group 3A can lose either 1 or 3 electrons giving a charge of +3 or +1

  Group 5A can lose either 5 or 3 electrons giving a charge of +5 or +3

The number of lost electron confers the stability on the configuration.

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3 years ago
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